Here's a special offer: Combine your purchases of these classic volumes on the history and machinations of stamp counterfeiting by acclaimed authority H.K. Petschel, and save. Get both books for $50.

Order both his original book, Stamp Counterfeiting: The Evolution of an Unrecognized Crime and his just-published sequel, More Stamp Counterfeiting: The Perfect Crime together for $50. That's a $4 savings over those books if ordered individually.

Want even more savings? When you start the check-out, be sure to type in the coupon code STAMPED and get free shipping.